org.sf.xrime.preprocessing.smth.SmthTransformer.java Source code

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Here is the source code for org.sf.xrime.preprocessing.smth.SmthTransformer.java

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/*
 * Copyright (C) IBM Corp. 2009.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.sf.xrime.preprocessing.smth;

import java.io.IOException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.SequenceFileOutputFormat;
import org.apache.hadoop.util.ToolRunner;
import org.sf.xrime.ProcessorExecutionException;
import org.sf.xrime.Transformer;
import org.sf.xrime.model.vertex.AdjVertex;

public class SmthTransformer extends Transformer {
    public SmthTransformer() {
        super();
    }

    public SmthTransformer(Path path_in, Path path_out) {
        super(path_in, path_out);
    }

    @Override
    public void execute() throws ProcessorExecutionException {
        JobConf smthPreprocess = new JobConf(conf, SmthTransformer.class);
        smthPreprocess.setJobName("SmthPreprocess");

        smthPreprocess.setOutputFormat(SequenceFileOutputFormat.class);

        smthPreprocess.setMapperClass(SmthMapper.class);
        smthPreprocess.setReducerClass(SmthReducer.class);
        smthPreprocess.setNumMapTasks(mapperNum);
        smthPreprocess.setNumReduceTasks(reducerNum);

        smthPreprocess.setMapOutputValueClass(AdjVertex.class);
        smthPreprocess.setOutputKeyClass(Text.class);
        smthPreprocess.setOutputValueClass(AdjVertex.class);

        FileInputFormat.setInputPaths(smthPreprocess, srcPath);
        FileOutputFormat.setOutputPath(smthPreprocess, destPath);

        try {
            this.runningJob = JobClient.runJob(smthPreprocess);
        } catch (IOException e) {
            throw new ProcessorExecutionException(e);
        }

    }

    /**
     * Main method for this transformer.
     * @param args input arguments
     */
    public static void main(String[] args) {
        try {
            int res = ToolRunner.run(new SmthTransformer(), args);
            System.exit(res);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}